Window ventilator



Aug. 21, 1928.

J. M. LUDLOW WINDOW VENTILATDR Filed Jan. 1928 A TTORNEY.

Patented Aug. 21, 1928.

UNITED STATES JAMES M. LUDLOW, OF CABROLLTON, OHIO.

WINDOW VENTILATOR.

Application filed January 6, 1928.

This invention relates to screens, and particularly to a ventilating screen having novel features by which direct draft through the screen is prevented, and in which provision is made for arresting dust or other impurities carried by the air.

It is a further object of this invention to provide a window screen which is adjustable to fit window frames of different w dths,

within predetermined bounds, and specifically, to provide louvers in such relation to each other as to prevent movement of the air horizontally through the screen, it being the purpose of the inventor to so arrange the louvers that the direct force of the air is broken in its passage through the window opening.

It is a still further object of this invention to produce a ventilator which will arrest the dust carried by the air and to provide means whereby the dust collected or arrested may be expeditiously dislodged from the screen.

With the foregoing and other ob]ec ts in view, the invention consists in the details of construction, and in the arrangement, and combination of parts to be hereinafter more fully set forth and claimed.

In describing the invention in detail, reference will be had to the accompanying drawi ngs forming part of this application, wherein like characters denote corresponding parts in the several views, and in which- Figure 1 illustrates a view in elevation of the outer screen frame detached;

Figure 2 illustrates a view in elevation of the inner screen frame detached;

Figure 3 illustrates an enlarged vertical sectional view thereof; and

Figure 4 illustrates a plan view of a frag ment of the screen, partly in section.

In these drawings, 5 denotes the outer screen frame, 6 the inner screen frame, which are normally in contact with each other. The outer frame is provided with a plurality of apertures 7 to receive bolts 8, whereas the inner frame has slots 9, each of which alines with an aperture in the outer screen, and the bolts 8 project through the apertures and the slots. The bolts are supplied with appropriate nuts 10 for binding the frames together after they have been properly ad usted in length to fit the window frame.

The opening of the outer frame 5 is covered by a wire mesh 11 that may be secured against the outer surface of the outer screen at the ends by binding strips, such as 12, and the outer frame is further provided with out Serial No. 244,936. I

wardly anddownwardly projecting louvers 13 and 14, the former of which extends downwardly below the upper edge of the latter, and the louver 14 terminates in a plane below the lower edge of the screen opening of the said outer frame. This relation of parts prevents movement of the air horizontally through the screen and the louvers tend to break the force of the draft, although they afford sufficient ventilation under ordinary conditions of use.

The opening of the inner frame is preferably guarded b a fabric panel 15 whose edges are cause to extend inwardly, as at 16, and the inwardly extending portions are clamped against the inner edges 17 of the frame by binding strips 18 that may be secured in place in any appropriate manner, as by fastenings 19, such as small nails, screws, or the like.

The opening in the outer frame is also supplied With a fabric panel 15, similar to the fabric 15, whose edges as at 16 are secured in place by strips 18 and fastenings 19.

It has been found in practice that a screen of this character is draft-proof in any kind of weather, yet a free current of air may pass through the said screen.

Of course the force of the current of air through the screen is reduced and in the space between the two screens the air is comparatively still and dust which is carried by the air settles in this space, and hence the air is to some degree purified before it enters the building.

It is the purpose of the inventor to con struct the screen of rust-proof and weatherproof material, in so far as such materials are attainable, and, in order to produce a tight fit or joint between the screen, the window sash and the window frame, a binding or facing strip 20 is applied to the screen.

The louvers extend practically the full length of the screen and, as stated, one overlaps the other, completely shielding the opening in the screen, and the said louvers are set at such angles as to shed water, snow and sleet, yet allowing suflicient space for the free passage of air in an upward direction back of the said louvers.

It has been found in practice furthermore that dust which is arrested by the cloth will be deposited in the apertures of the screen and it can be readily discharged therefrom by separating the screen frames after the nuts of the bolts have been properly manipulated opening of the said outer frame, superimposed louvers on said outer frame having their edges overlapping and the lowermost louver having its lower edge on a plane below the aperture of the frame, securing members extending through one of the frames, and the other of said frames haiing slots for securing said securing members, whereby the frames are adjustably secured in contact with 20 each other.

JAMES M. LUDLOVV. 

